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cliconnect.c@ 16

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Last change on this file since 16 was 1, checked in by Paul Smedley, 18 years ago
Initial code import
File size: 54.0 KB

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1	/*
2	Unix SMB/CIFS implementation.
3	client connect/disconnect routines
4	Copyright (C) Andrew Tridgell 1994-1998
5	Copyright (C) Andrew Bartlett 2001-2003
6
7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20	*/
21
22	#include "includes.h"
23
24	extern pstring user_socket_options;
25
26	static const struct {
27	int prot;
28	const char *name;
29	} prots[] = {
30	{PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
31	{PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
32	{PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
33	{PROTOCOL_LANMAN1,"LANMAN1.0"},
34	{PROTOCOL_LANMAN2,"LM1.2X002"},
35	{PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
36	{PROTOCOL_LANMAN2,"LANMAN2.1"},
37	{PROTOCOL_LANMAN2,"Samba"},
38	{PROTOCOL_NT1,"NT LANMAN 1.0"},
39	{PROTOCOL_NT1,"NT LM 0.12"},
40	{-1,NULL}
41	};
42
43	/**
44	* Set the user session key for a connection
45	* @param cli The cli structure to add it too
46	* @param session_key The session key used. (A copy of this is taken for the cli struct)
47	*
48	*/
49
50	static void cli_set_session_key (struct cli_state *cli, const DATA_BLOB session_key)
51	{
52	cli->user_session_key = data_blob(session_key.data, session_key.length);
53	}
54
55	/****************************************************************************
56	Do an old lanman2 style session setup.
57	****************************************************************************/
58
59	static NTSTATUS cli_session_setup_lanman2(struct cli_state *cli,
60	const char *user,
61	const char *pass, size_t passlen,
62	const char *workgroup)
63	{
64	DATA_BLOB session_key = data_blob(NULL, 0);
65	DATA_BLOB lm_response = data_blob(NULL, 0);
66	fstring pword;
67	char *p;
68
69	if (passlen > sizeof(pword)-1) {
70	return NT_STATUS_INVALID_PARAMETER;
71	}
72
73	/* LANMAN servers predate NT status codes and Unicode and ignore those
74	smb flags so we must disable the corresponding default capabilities
75	that would otherwise cause the Unicode and NT Status flags to be
76	set (and even returned by the server) */
77
78	cli->capabilities &= ~(CAP_UNICODE \| CAP_STATUS32);
79
80	/* if in share level security then don't send a password now */
81	if (!(cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL))
82	passlen = 0;
83
84	if (passlen > 0 && (cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen != 24) {
85	/* Encrypted mode needed, and non encrypted password supplied. */
86	lm_response = data_blob(NULL, 24);
87	if (!SMBencrypt(pass, cli->secblob.data,(uchar *)lm_response.data)) {
88	DEBUG(1, ("Password is > 14 chars in length, and is therefore incompatible with Lanman authentication\n"));
89	return NT_STATUS_ACCESS_DENIED;
90	}
91	} else if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen == 24) {
92	/* Encrypted mode needed, and encrypted password supplied. */
93	lm_response = data_blob(pass, passlen);
94	} else if (passlen > 0) {
95	/* Plaintext mode needed, assume plaintext supplied. */
96	passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
97	lm_response = data_blob(pass, passlen);
98	}
99
100	/* send a session setup command */
101	memset(cli->outbuf,'\0',smb_size);
102	set_message(cli->outbuf,10, 0, True);
103	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
104	cli_setup_packet(cli);
105
106	SCVAL(cli->outbuf,smb_vwv0,0xFF);
107	SSVAL(cli->outbuf,smb_vwv2,cli->max_xmit);
108	SSVAL(cli->outbuf,smb_vwv3,2);
109	SSVAL(cli->outbuf,smb_vwv4,1);
110	SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
111	SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
112
113	p = smb_buf(cli->outbuf);
114	memcpy(p,lm_response.data,lm_response.length);
115	p += lm_response.length;
116	p += clistr_push(cli, p, user, -1, STR_TERMINATE\|STR_UPPER);
117	p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE\|STR_UPPER);
118	p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
119	p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
120	cli_setup_bcc(cli, p);
121
122	if (!cli_send_smb(cli) \|\| !cli_receive_smb(cli)) {
123	return cli_nt_error(cli);
124	}
125
126	show_msg(cli->inbuf);
127
128	if (cli_is_error(cli)) {
129	return cli_nt_error(cli);
130	}
131
132	/* use the returned vuid from now on */
133	cli->vuid = SVAL(cli->inbuf,smb_uid);
134	fstrcpy(cli->user_name, user);
135
136	if (session_key.data) {
137	/* Have plaintext orginal */
138	cli_set_session_key(cli, session_key);
139	}
140
141	return NT_STATUS_OK;
142	}
143
144	/****************************************************************************
145	Work out suitable capabilities to offer the server.
146	****************************************************************************/
147
148	static uint32 cli_session_setup_capabilities(struct cli_state *cli)
149	{
150	uint32 capabilities = CAP_NT_SMBS;
151
152	if (!cli->force_dos_errors)
153	capabilities \|= CAP_STATUS32;
154
155	if (cli->use_level_II_oplocks)
156	capabilities \|= CAP_LEVEL_II_OPLOCKS;
157
158	capabilities \|= (cli->capabilities & (CAP_UNICODE\|CAP_LARGE_FILES\|CAP_LARGE_READX\|CAP_LARGE_WRITEX\|CAP_DFS));
159	return capabilities;
160	}
161
162	/****************************************************************************
163	Do a NT1 guest session setup.
164	****************************************************************************/
165
166	static NTSTATUS cli_session_setup_guest(struct cli_state *cli)
167	{
168	char *p;
169	uint32 capabilities = cli_session_setup_capabilities(cli);
170
171	memset(cli->outbuf, '\0', smb_size);
172	set_message(cli->outbuf,13,0,True);
173	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
174	cli_setup_packet(cli);
175
176	SCVAL(cli->outbuf,smb_vwv0,0xFF);
177	SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
178	SSVAL(cli->outbuf,smb_vwv3,2);
179	SSVAL(cli->outbuf,smb_vwv4,cli->pid);
180	SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
181	SSVAL(cli->outbuf,smb_vwv7,0);
182	SSVAL(cli->outbuf,smb_vwv8,0);
183	SIVAL(cli->outbuf,smb_vwv11,capabilities);
184	p = smb_buf(cli->outbuf);
185	p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* username */
186	p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* workgroup */
187	p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
188	p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
189	cli_setup_bcc(cli, p);
190
191	if (!cli_send_smb(cli) \|\| !cli_receive_smb(cli)) {
192	return cli_nt_error(cli);
193	}
194
195	show_msg(cli->inbuf);
196
197	if (cli_is_error(cli)) {
198	return cli_nt_error(cli);
199	}
200
201	cli->vuid = SVAL(cli->inbuf,smb_uid);
202
203	p = smb_buf(cli->inbuf);
204	p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
205	p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
206	p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
207
208	if (strstr(cli->server_type, "Samba")) {
209	cli->is_samba = True;
210	}
211
212	fstrcpy(cli->user_name, "");
213
214	return NT_STATUS_OK;
215	}
216
217	/****************************************************************************
218	Do a NT1 plaintext session setup.
219	****************************************************************************/
220
221	static NTSTATUS cli_session_setup_plaintext(struct cli_state *cli,
222	const char user, const char pass,
223	const char *workgroup)
224	{
225	uint32 capabilities = cli_session_setup_capabilities(cli);
226	char *p;
227	fstring lanman;
228
229	fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
230
231	memset(cli->outbuf, '\0', smb_size);
232	set_message(cli->outbuf,13,0,True);
233	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
234	cli_setup_packet(cli);
235
236	SCVAL(cli->outbuf,smb_vwv0,0xFF);
237	SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
238	SSVAL(cli->outbuf,smb_vwv3,2);
239	SSVAL(cli->outbuf,smb_vwv4,cli->pid);
240	SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
241	SSVAL(cli->outbuf,smb_vwv8,0);
242	SIVAL(cli->outbuf,smb_vwv11,capabilities);
243	p = smb_buf(cli->outbuf);
244
245	/* check wether to send the ASCII or UNICODE version of the password */
246
247	if ( (capabilities & CAP_UNICODE) == 0 ) {
248	p += clistr_push(cli, p, pass, -1, STR_TERMINATE); /* password */
249	SSVAL(cli->outbuf,smb_vwv7,PTR_DIFF(p, smb_buf(cli->outbuf)));
250	}
251	else {
252	p += clistr_push(cli, p, pass, -1, STR_UNICODE\|STR_TERMINATE); /* unicode password */
253	SSVAL(cli->outbuf,smb_vwv8,PTR_DIFF(p, smb_buf(cli->outbuf)));
254	}
255
256	p += clistr_push(cli, p, user, -1, STR_TERMINATE); /* username */
257	p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE); /* workgroup */
258	p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
259	p += clistr_push(cli, p, lanman, -1, STR_TERMINATE);
260	cli_setup_bcc(cli, p);
261
262	if (!cli_send_smb(cli) \|\| !cli_receive_smb(cli)) {
263	return cli_nt_error(cli);
264	}
265
266	show_msg(cli->inbuf);
267
268	if (cli_is_error(cli)) {
269	return cli_nt_error(cli);
270	}
271
272	cli->vuid = SVAL(cli->inbuf,smb_uid);
273	p = smb_buf(cli->inbuf);
274	p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
275	p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
276	p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
277	fstrcpy(cli->user_name, user);
278
279	if (strstr(cli->server_type, "Samba")) {
280	cli->is_samba = True;
281	}
282
283	return NT_STATUS_OK;
284	}
285
286	/****************************************************************************
287	do a NT1 NTLM/LM encrypted session setup - for when extended security
288	is not negotiated.
289	@param cli client state to create do session setup on
290	@param user username
291	@param pass either cleartext password (passlen !=24) or LM response.
292	@param ntpass NT response, implies ntpasslen >=24, implies pass is not clear
293	@param workgroup The user's domain.
294	****************************************************************************/
295
296	static NTSTATUS cli_session_setup_nt1(struct cli_state cli, const char user,
297	const char *pass, size_t passlen,
298	const char *ntpass, size_t ntpasslen,
299	const char *workgroup)
300	{
301	uint32 capabilities = cli_session_setup_capabilities(cli);
302	DATA_BLOB lm_response = data_blob(NULL, 0);
303	DATA_BLOB nt_response = data_blob(NULL, 0);
304	DATA_BLOB session_key = data_blob(NULL, 0);
305	NTSTATUS result;
306	char *p;
307
308	if (passlen == 0) {
309	/* do nothing - guest login */
310	} else if (passlen != 24) {
311	if (lp_client_ntlmv2_auth()) {
312	DATA_BLOB server_chal;
313	DATA_BLOB names_blob;
314	server_chal = data_blob(cli->secblob.data, MIN(cli->secblob.length, 8));
315
316	/* note that the 'workgroup' here is a best guess - we don't know
317	the server's domain at this point. The 'server name' is also
318	dodgy...
319	*/
320	names_blob = NTLMv2_generate_names_blob(cli->called.name, workgroup);
321
322	if (!SMBNTLMv2encrypt(user, workgroup, pass, &server_chal,
323	&names_blob,
324	&lm_response, &nt_response, &session_key)) {
325	data_blob_free(&names_blob);
326	data_blob_free(&server_chal);
327	return NT_STATUS_ACCESS_DENIED;
328	}
329	data_blob_free(&names_blob);
330	data_blob_free(&server_chal);
331
332	} else {
333	uchar nt_hash[16];
334	E_md4hash(pass, nt_hash);
335
336	#ifdef LANMAN_ONLY
337	nt_response = data_blob(NULL, 0);
338	#else
339	nt_response = data_blob(NULL, 24);
340	SMBNTencrypt(pass,cli->secblob.data,nt_response.data);
341	#endif
342	/* non encrypted password supplied. Ignore ntpass. */
343	if (lp_client_lanman_auth()) {
344	lm_response = data_blob(NULL, 24);
345	if (!SMBencrypt(pass,cli->secblob.data, lm_response.data)) {
346	/* Oops, the LM response is invalid, just put
347	the NT response there instead */
348	data_blob_free(&lm_response);
349	lm_response = data_blob(nt_response.data, nt_response.length);
350	}
351	} else {
352	/* LM disabled, place NT# in LM field instead */
353	lm_response = data_blob(nt_response.data, nt_response.length);
354	}
355
356	session_key = data_blob(NULL, 16);
357	#ifdef LANMAN_ONLY
358	E_deshash(pass, session_key.data);
359	memset(&session_key.data[8], '\0', 8);
360	#else
361	SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
362	#endif
363	}
364	#ifdef LANMAN_ONLY
365	cli_simple_set_signing(cli, session_key, lm_response);
366	#else
367	cli_simple_set_signing(cli, session_key, nt_response);
368	#endif
369	} else {
370	/* pre-encrypted password supplied. Only used for
371	security=server, can't do
372	signing because we don't have original key */
373
374	lm_response = data_blob(pass, passlen);
375	nt_response = data_blob(ntpass, ntpasslen);
376	}
377
378	/* send a session setup command */
379	memset(cli->outbuf,'\0',smb_size);
380
381	set_message(cli->outbuf,13,0,True);
382	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
383	cli_setup_packet(cli);
384
385	SCVAL(cli->outbuf,smb_vwv0,0xFF);
386	SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
387	SSVAL(cli->outbuf,smb_vwv3,2);
388	SSVAL(cli->outbuf,smb_vwv4,cli->pid);
389	SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
390	SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
391	SSVAL(cli->outbuf,smb_vwv8,nt_response.length);
392	SIVAL(cli->outbuf,smb_vwv11,capabilities);
393	p = smb_buf(cli->outbuf);
394	if (lm_response.length) {
395	memcpy(p,lm_response.data, lm_response.length); p += lm_response.length;
396	}
397	if (nt_response.length) {
398	memcpy(p,nt_response.data, nt_response.length); p += nt_response.length;
399	}
400	p += clistr_push(cli, p, user, -1, STR_TERMINATE);
401
402	/* Upper case here might help some NTLMv2 implementations */
403	p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE\|STR_UPPER);
404	p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
405	p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
406	cli_setup_bcc(cli, p);
407
408	if (!cli_send_smb(cli) \|\| !cli_receive_smb(cli)) {
409	result = cli_nt_error(cli);
410	goto end;
411	}
412
413	/* show_msg(cli->inbuf); */
414
415	if (cli_is_error(cli)) {
416	result = cli_nt_error(cli);
417	goto end;
418	}
419
420	/* use the returned vuid from now on */
421	cli->vuid = SVAL(cli->inbuf,smb_uid);
422
423	p = smb_buf(cli->inbuf);
424	p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
425	p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
426	p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
427
428	if (strstr(cli->server_type, "Samba")) {
429	cli->is_samba = True;
430	}
431
432	fstrcpy(cli->user_name, user);
433
434	if (session_key.data) {
435	/* Have plaintext orginal */
436	cli_set_session_key(cli, session_key);
437	}
438
439	result = NT_STATUS_OK;
440	end:
441	data_blob_free(&lm_response);
442	data_blob_free(&nt_response);
443	data_blob_free(&session_key);
444	return result;
445	}
446
447	/****************************************************************************
448	Send a extended security session setup blob
449	****************************************************************************/
450
451	static BOOL cli_session_setup_blob_send(struct cli_state *cli, DATA_BLOB blob)
452	{
453	uint32 capabilities = cli_session_setup_capabilities(cli);
454	char *p;
455
456	capabilities \|= CAP_EXTENDED_SECURITY;
457
458	/* send a session setup command */
459	memset(cli->outbuf,'\0',smb_size);
460
461	set_message(cli->outbuf,12,0,True);
462	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
463
464	cli_setup_packet(cli);
465
466	SCVAL(cli->outbuf,smb_vwv0,0xFF);
467	SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
468	SSVAL(cli->outbuf,smb_vwv3,2);
469	SSVAL(cli->outbuf,smb_vwv4,1);
470	SIVAL(cli->outbuf,smb_vwv5,0);
471	SSVAL(cli->outbuf,smb_vwv7,blob.length);
472	SIVAL(cli->outbuf,smb_vwv10,capabilities);
473	p = smb_buf(cli->outbuf);
474	memcpy(p, blob.data, blob.length);
475	p += blob.length;
476	p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
477	p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
478	cli_setup_bcc(cli, p);
479	return cli_send_smb(cli);
480	}
481
482	/****************************************************************************
483	Send a extended security session setup blob, returning a reply blob.
484	****************************************************************************/
485
486	static DATA_BLOB cli_session_setup_blob_receive(struct cli_state *cli)
487	{
488	DATA_BLOB blob2 = data_blob(NULL, 0);
489	char *p;
490	size_t len;
491
492	if (!cli_receive_smb(cli))
493	return blob2;
494
495	show_msg(cli->inbuf);
496
497	if (cli_is_error(cli) && !NT_STATUS_EQUAL(cli_nt_error(cli),
498	NT_STATUS_MORE_PROCESSING_REQUIRED)) {
499	return blob2;
500	}
501
502	/* use the returned vuid from now on */
503	cli->vuid = SVAL(cli->inbuf,smb_uid);
504
505	p = smb_buf(cli->inbuf);
506
507	blob2 = data_blob(p, SVAL(cli->inbuf, smb_vwv3));
508
509	p += blob2.length;
510	p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
511
512	/* w2k with kerberos doesn't properly null terminate this field */
513	len = smb_buflen(cli->inbuf) - PTR_DIFF(p, smb_buf(cli->inbuf));
514	p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), len, 0);
515
516	return blob2;
517	}
518
519	#ifdef HAVE_KRB5
520	/****************************************************************************
521	Send a extended security session setup blob, returning a reply blob.
522	****************************************************************************/
523
524	/* The following is calculated from :
525	* (smb_size-4) = 35
526	* (smb_wcnt * 2) = 24 (smb_wcnt == 12 in cli_session_setup_blob_send() )
527	* (strlen("Unix") + 1 + strlen("Samba") + 1) * 2 = 22 (unicode strings at
528	* end of packet.
529	*/
530
531	#define BASE_SESSSETUP_BLOB_PACKET_SIZE (35 + 24 + 22)
532
533	static BOOL cli_session_setup_blob(struct cli_state *cli, DATA_BLOB blob, DATA_BLOB session_key_krb5)
534	{
535	int32 remaining = blob.length;
536	int32 cur = 0;
537	DATA_BLOB send_blob = data_blob(NULL, 0);
538	int32 max_blob_size = 0;
539
540	if (cli->max_xmit < BASE_SESSSETUP_BLOB_PACKET_SIZE + 1) {
541	DEBUG(0,("cli_session_setup_blob: cli->max_xmit too small "
542	"(was %u, need minimum %u)\n",
543	(unsigned int)cli->max_xmit,
544	BASE_SESSSETUP_BLOB_PACKET_SIZE));
545	cli_set_nt_error(cli, NT_STATUS_INVALID_PARAMETER);
546	return False;
547	}
548
549	max_blob_size = cli->max_xmit - BASE_SESSSETUP_BLOB_PACKET_SIZE;
550
551	while ( remaining > 0) {
552	if (remaining >= max_blob_size) {
553	send_blob.length = max_blob_size;
554	remaining -= max_blob_size;
555	} else {
556	DATA_BLOB null_blob = data_blob(NULL, 0);
557
558	send_blob.length = remaining;
559	remaining = 0;
560
561	/* This is the last packet in the sequence - turn signing on. */
562	cli_simple_set_signing(cli, session_key_krb5, null_blob);
563	}
564
565	send_blob.data = &blob.data[cur];
566	cur += send_blob.length;
567
568	DEBUG(10, ("cli_session_setup_blob: Remaining (%u) sending (%u) current (%u)\n",
569	(unsigned int)remaining,
570	(unsigned int)send_blob.length,
571	(unsigned int)cur ));
572
573	if (!cli_session_setup_blob_send(cli, send_blob)) {
574	DEBUG(0, ("cli_session_setup_blob: send failed\n"));
575	return False;
576	}
577
578	cli_session_setup_blob_receive(cli);
579
580	if (cli_is_error(cli) &&
581	!NT_STATUS_EQUAL( cli_get_nt_error(cli),
582	NT_STATUS_MORE_PROCESSING_REQUIRED)) {
583	DEBUG(0, ("cli_session_setup_blob: recieve failed (%s)\n",
584	nt_errstr(cli_get_nt_error(cli)) ));
585	return False;
586	}
587	}
588
589	return True;
590	}
591
592	/****************************************************************************
593	Use in-memory credentials cache
594	****************************************************************************/
595
596	static void use_in_memory_ccache(void) {
597	setenv(KRB5_ENV_CCNAME, "MEMORY:cliconnect", 1);
598	}
599
600	/****************************************************************************
601	Do a spnego/kerberos encrypted session setup.
602	****************************************************************************/
603
604	static ADS_STATUS cli_session_setup_kerberos(struct cli_state cli, const char principal, const char *workgroup)
605	{
606	DATA_BLOB negTokenTarg;
607	DATA_BLOB session_key_krb5;
608	int rc;
609
610	DEBUG(2,("Doing kerberos session setup\n"));
611
612	/* generate the encapsulated kerberos5 ticket */
613	rc = spnego_gen_negTokenTarg(principal, 0, &negTokenTarg, &session_key_krb5, 0, NULL);
614
615	if (rc) {
616	DEBUG(1, ("cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: %s\n",
617	error_message(rc)));
618	return ADS_ERROR_KRB5(rc);
619	}
620
621	#if 0
622	file_save("negTokenTarg.dat", negTokenTarg.data, negTokenTarg.length);
623	#endif
624
625	if (!cli_session_setup_blob(cli, negTokenTarg, session_key_krb5)) {
626	data_blob_free(&negTokenTarg);
627	data_blob_free(&session_key_krb5);
628	ADS_ERROR_NT(cli_nt_error(cli));
629	}
630
631	cli_set_session_key(cli, session_key_krb5);
632
633	data_blob_free(&negTokenTarg);
634	data_blob_free(&session_key_krb5);
635
636	if (cli_is_error(cli)) {
637	if (NT_STATUS_IS_OK(cli_nt_error(cli))) {
638	return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
639	}
640	}
641	return ADS_ERROR_NT(cli_nt_error(cli));
642	}
643	#endif /* HAVE_KRB5 */
644
645
646	/****************************************************************************
647	Do a spnego/NTLMSSP encrypted session setup.
648	****************************************************************************/
649
650	static NTSTATUS cli_session_setup_ntlmssp(struct cli_state cli, const char user,
651	const char pass, const char domain)
652	{
653	struct ntlmssp_state *ntlmssp_state;
654	NTSTATUS nt_status;
655	int turn = 1;
656	DATA_BLOB msg1;
657	DATA_BLOB blob = data_blob(NULL, 0);
658	DATA_BLOB blob_in = data_blob(NULL, 0);
659	DATA_BLOB blob_out = data_blob(NULL, 0);
660
661	cli_temp_set_signing(cli);
662
663	if (!NT_STATUS_IS_OK(nt_status = ntlmssp_client_start(&ntlmssp_state))) {
664	return nt_status;
665	}
666	ntlmssp_want_feature(ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
667
668	if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
669	return nt_status;
670	}
671	if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
672	return nt_status;
673	}
674	if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, pass))) {
675	return nt_status;
676	}
677
678	do {
679	nt_status = ntlmssp_update(ntlmssp_state,
680	blob_in, &blob_out);
681	data_blob_free(&blob_in);
682	if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) \|\| NT_STATUS_IS_OK(nt_status)) {
683	if (turn == 1) {
684	/* and wrap it in a SPNEGO wrapper */
685	msg1 = gen_negTokenInit(OID_NTLMSSP, blob_out);
686	} else {
687	/* wrap it in SPNEGO */
688	msg1 = spnego_gen_auth(blob_out);
689	}
690
691	/* now send that blob on its way */
692	if (!cli_session_setup_blob_send(cli, msg1)) {
693	DEBUG(3, ("Failed to send NTLMSSP/SPNEGO blob to server!\n"));
694	nt_status = NT_STATUS_UNSUCCESSFUL;
695	} else {
696	data_blob_free(&msg1);
697
698	blob = cli_session_setup_blob_receive(cli);
699
700	nt_status = cli_nt_error(cli);
701	if (cli_is_error(cli) && NT_STATUS_IS_OK(nt_status)) {
702	if (cli->smb_rw_error == READ_BAD_SIG) {
703	nt_status = NT_STATUS_ACCESS_DENIED;
704	} else {
705	nt_status = NT_STATUS_UNSUCCESSFUL;
706	}
707	}
708	}
709	}
710
711	if (!blob.length) {
712	if (NT_STATUS_IS_OK(nt_status)) {
713	nt_status = NT_STATUS_UNSUCCESSFUL;
714	}
715	} else if ((turn == 1) &&
716	NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
717	DATA_BLOB tmp_blob = data_blob(NULL, 0);
718	/* the server might give us back two challenges */
719	if (!spnego_parse_challenge(blob, &blob_in,
720	&tmp_blob)) {
721	DEBUG(3,("Failed to parse challenges\n"));
722	nt_status = NT_STATUS_INVALID_PARAMETER;
723	}
724	data_blob_free(&tmp_blob);
725	} else {
726	if (!spnego_parse_auth_response(blob, nt_status,
727	&blob_in)) {
728	DEBUG(3,("Failed to parse auth response\n"));
729	if (NT_STATUS_IS_OK(nt_status)
730	\|\| NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED))
731	nt_status = NT_STATUS_INVALID_PARAMETER;
732	}
733	}
734	data_blob_free(&blob);
735	data_blob_free(&blob_out);
736	turn++;
737	} while (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED));
738
739	if (NT_STATUS_IS_OK(nt_status)) {
740
741	DATA_BLOB key = data_blob(ntlmssp_state->session_key.data,
742	ntlmssp_state->session_key.length);
743	DATA_BLOB null_blob = data_blob(NULL, 0);
744	BOOL res;
745
746	fstrcpy(cli->server_domain, ntlmssp_state->server_domain);
747	cli_set_session_key(cli, ntlmssp_state->session_key);
748
749	res = cli_simple_set_signing(cli, key, null_blob);
750
751	data_blob_free(&key);
752
753	if (res) {
754
755	/* 'resign' the last message, so we get the right sequence numbers
756	for checking the first reply from the server */
757	cli_calculate_sign_mac(cli);
758
759	if (!cli_check_sign_mac(cli)) {
760	nt_status = NT_STATUS_ACCESS_DENIED;
761	}
762	}
763	}
764
765	/* we have a reference conter on ntlmssp_state, if we are signing
766	then the state will be kept by the signing engine */
767
768	ntlmssp_end(&ntlmssp_state);
769
770	return nt_status;
771	}
772
773	/****************************************************************************
774	Do a spnego encrypted session setup.
775	****************************************************************************/
776
777	ADS_STATUS cli_session_setup_spnego(struct cli_state cli, const char user,
778	const char pass, const char domain)
779	{
780	char *principal;
781	char *OIDs[ASN1_MAX_OIDS];
782	int i;
783	BOOL got_kerberos_mechanism = False;
784	DATA_BLOB blob;
785
786	DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
787
788	/* the server might not even do spnego */
789	if (cli->secblob.length <= 16) {
790	DEBUG(3,("server didn't supply a full spnego negprot\n"));
791	goto ntlmssp;
792	}
793
794	#if 0
795	file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
796	#endif
797
798	/* there is 16 bytes of GUID before the real spnego packet starts */
799	blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
800
801	/* the server sent us the first part of the SPNEGO exchange in the negprot
802	reply */
803	if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
804	data_blob_free(&blob);
805	return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
806	}
807	data_blob_free(&blob);
808
809	/* make sure the server understands kerberos */
810	for (i=0;OIDs[i];i++) {
811	DEBUG(3,("got OID=%s\n", OIDs[i]));
812	if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 \|\|
813	strcmp(OIDs[i], OID_KERBEROS5) == 0) {
814	got_kerberos_mechanism = True;
815	}
816	free(OIDs[i]);
817	}
818
819	DEBUG(3,("got principal=%s\n", principal ? principal : "<null>"));
820
821	if (got_kerberos_mechanism && (principal == NULL)) {
822	/*
823	* It is WRONG to depend on the principal sent in the negprot
824	* reply, but right now we do it. So for safety (don't
825	* segfault later) disable Kerberos when no principal was
826	* sent. -- VL
827	*/
828	DEBUG(1, ("Kerberos mech was offered, but no principal was "
829	"sent, disabling Kerberos\n"));
830	cli->use_kerberos = False;
831	}
832
833	fstrcpy(cli->user_name, user);
834
835	#ifdef HAVE_KRB5
836	/* If password is set we reauthenticate to kerberos server
837	* and do not store results */
838
839	if (got_kerberos_mechanism && cli->use_kerberos) {
840	ADS_STATUS rc;
841
842	if (pass && *pass) {
843	int ret;
844
845	use_in_memory_ccache();
846	ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
847
848	if (ret){
849	SAFE_FREE(principal);
850	DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
851	if (cli->fallback_after_kerberos)
852	goto ntlmssp;
853	return ADS_ERROR_KRB5(ret);
854	}
855	}
856
857	rc = cli_session_setup_kerberos(cli, principal, domain);
858	if (ADS_ERR_OK(rc) \|\| !cli->fallback_after_kerberos) {
859	SAFE_FREE(principal);
860	return rc;
861	}
862	}
863	#endif
864
865	SAFE_FREE(principal);
866
867	ntlmssp:
868
869	return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, user, pass, domain));
870	}
871
872	/****************************************************************************
873	Send a session setup. The username and workgroup is in UNIX character
874	format and must be converted to DOS codepage format before sending. If the
875	password is in plaintext, the same should be done.
876	****************************************************************************/
877
878	NTSTATUS cli_session_setup(struct cli_state *cli,
879	const char *user,
880	const char *pass, int passlen,
881	const char *ntpass, int ntpasslen,
882	const char *workgroup)
883	{
884	char *p;
885	fstring user2;
886
887	/* allow for workgroups as part of the username */
888	fstrcpy(user2, user);
889	if ((p=strchr_m(user2,'\\')) \|\| (p=strchr_m(user2,'/')) \|\|
890	(p=strchr_m(user2,*lp_winbind_separator()))) {
891	*p = 0;
892	user = p+1;
893	workgroup = user2;
894	}
895
896	if (cli->protocol < PROTOCOL_LANMAN1) {
897	return NT_STATUS_OK;
898	}
899
900	/* now work out what sort of session setup we are going to
901	do. I have split this into separate functions to make the
902	flow a bit easier to understand (tridge) */
903
904	/* if its an older server then we have to use the older request format */
905
906	if (cli->protocol < PROTOCOL_NT1) {
907	if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
908	DEBUG(1, ("Server requested LM password but 'client lanman auth'"
909	" is disabled\n"));
910	return NT_STATUS_ACCESS_DENIED;
911	}
912
913	if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
914	!lp_client_plaintext_auth() && (*pass)) {
915	DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
916	" is disabled\n"));
917	return NT_STATUS_ACCESS_DENIED;
918	}
919
920	return cli_session_setup_lanman2(cli, user, pass, passlen,
921	workgroup);
922	}
923
924	/* if no user is supplied then we have to do an anonymous connection.
925	passwords are ignored */
926
927	if (!user \|\| !*user)
928	return cli_session_setup_guest(cli);
929
930	/* if the server is share level then send a plaintext null
931	password at this point. The password is sent in the tree
932	connect */
933
934	if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
935	return cli_session_setup_plaintext(cli, user, "", workgroup);
936
937	/* if the server doesn't support encryption then we have to use
938	plaintext. The second password is ignored */
939
940	if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
941	if (!lp_client_plaintext_auth() && (*pass)) {
942	DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
943	" is disabled\n"));
944	return NT_STATUS_ACCESS_DENIED;
945	}
946	return cli_session_setup_plaintext(cli, user, pass, workgroup);
947	}
948
949	/* if the server supports extended security then use SPNEGO */
950
951	if (cli->capabilities & CAP_EXTENDED_SECURITY) {
952	ADS_STATUS status = cli_session_setup_spnego(cli, user, pass, workgroup);
953	if (!ADS_ERR_OK(status)) {
954	DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
955	return ads_ntstatus(status);
956	}
957	} else {
958	NTSTATUS status;
959
960	/* otherwise do a NT1 style session setup */
961	status = cli_session_setup_nt1(cli, user, pass, passlen,
962	ntpass, ntpasslen, workgroup);
963	if (!NT_STATUS_IS_OK(status)) {
964	DEBUG(3,("cli_session_setup: NT1 session setup "
965	"failed: %s\n", nt_errstr(status)));
966	return status;
967	}
968	}
969
970	if (strstr(cli->server_type, "Samba")) {
971	cli->is_samba = True;
972	}
973
974	return NT_STATUS_OK;
975
976	}
977
978	/****************************************************************************
979	Send a uloggoff.
980	*****************************************************************************/
981
982	BOOL cli_ulogoff(struct cli_state *cli)
983	{
984	memset(cli->outbuf,'\0',smb_size);
985	set_message(cli->outbuf,2,0,True);
986	SCVAL(cli->outbuf,smb_com,SMBulogoffX);
987	cli_setup_packet(cli);
988	SSVAL(cli->outbuf,smb_vwv0,0xFF);
989	SSVAL(cli->outbuf,smb_vwv2,0); /* no additional info */
990
991	cli_send_smb(cli);
992	if (!cli_receive_smb(cli))
993	return False;
994
995	if (cli_is_error(cli)) {
996	return False;
997	}
998
999	cli->cnum = -1;
1000	return True;
1001	}
1002
1003	/****************************************************************************
1004	Send a tconX.
1005	****************************************************************************/
1006
1007	BOOL cli_send_tconX(struct cli_state *cli,
1008	const char share, const char dev, const char *pass, int passlen)
1009	{
1010	fstring fullshare, pword;
1011	char *p;
1012	memset(cli->outbuf,'\0',smb_size);
1013	memset(cli->inbuf,'\0',smb_size);
1014
1015	fstrcpy(cli->share, share);
1016
1017	/* in user level security don't send a password now */
1018	if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
1019	passlen = 1;
1020	pass = "";
1021	} else if (!pass) {
1022	DEBUG(1, ("Server not using user level security and no password supplied.\n"));
1023	return False;
1024	}
1025
1026	if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
1027	*pass && passlen != 24) {
1028	if (!lp_client_lanman_auth()) {
1029	DEBUG(1, ("Server requested LANMAN password (share-level security) but 'client use lanman auth'"
1030	" is disabled\n"));
1031	return False;
1032	}
1033
1034	/*
1035	* Non-encrypted passwords - convert to DOS codepage before encryption.
1036	*/
1037	passlen = 24;
1038	SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
1039	} else {
1040	if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL\|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
1041	if (!lp_client_plaintext_auth() && (*pass)) {
1042	DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1043	" is disabled\n"));
1044	return False;
1045	}
1046
1047	/*
1048	* Non-encrypted passwords - convert to DOS codepage before using.
1049	*/
1050	passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1051
1052	} else {
1053	if (passlen) {
1054	memcpy(pword, pass, passlen);
1055	}
1056	}
1057	}
1058
1059	slprintf(fullshare, sizeof(fullshare)-1,
1060	"\\\\%s\\%s", cli->desthost, share);
1061
1062	set_message(cli->outbuf,4, 0, True);
1063	SCVAL(cli->outbuf,smb_com,SMBtconX);
1064	cli_setup_packet(cli);
1065
1066	SSVAL(cli->outbuf,smb_vwv0,0xFF);
1067	SSVAL(cli->outbuf,smb_vwv3,passlen);
1068
1069	p = smb_buf(cli->outbuf);
1070	if (passlen) {
1071	memcpy(p,pword,passlen);
1072	}
1073	p += passlen;
1074	p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE \|STR_UPPER);
1075	p += clistr_push(cli, p, dev, -1, STR_TERMINATE \|STR_UPPER \| STR_ASCII);
1076
1077	cli_setup_bcc(cli, p);
1078
1079	cli_send_smb(cli);
1080	if (!cli_receive_smb(cli))
1081	return False;
1082
1083	if (cli_is_error(cli))
1084	return False;
1085
1086	clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE\|STR_ASCII);
1087
1088	if (cli->protocol >= PROTOCOL_NT1 &&
1089	smb_buflen(cli->inbuf) == 3) {
1090	/* almost certainly win95 - enable bug fixes */
1091	cli->win95 = True;
1092	}
1093
1094	/* Make sure that we have the optional support 16-bit field. WCT > 2 */
1095	/* Avoids issues when connecting to Win9x boxes sharing files */
1096
1097	cli->dfsroot = False;
1098	if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1099	cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1100
1101	cli->cnum = SVAL(cli->inbuf,smb_tid);
1102	return True;
1103	}
1104
1105	/****************************************************************************
1106	Send a tree disconnect.
1107	****************************************************************************/
1108
1109	BOOL cli_tdis(struct cli_state *cli)
1110	{
1111	memset(cli->outbuf,'\0',smb_size);
1112	set_message(cli->outbuf,0,0,True);
1113	SCVAL(cli->outbuf,smb_com,SMBtdis);
1114	SSVAL(cli->outbuf,smb_tid,cli->cnum);
1115	cli_setup_packet(cli);
1116
1117	cli_send_smb(cli);
1118	if (!cli_receive_smb(cli))
1119	return False;
1120
1121	if (cli_is_error(cli)) {
1122	return False;
1123	}
1124
1125	cli->cnum = -1;
1126	return True;
1127	}
1128
1129	/****************************************************************************
1130	Send a negprot command.
1131	****************************************************************************/
1132
1133	void cli_negprot_send(struct cli_state *cli)
1134	{
1135	char *p;
1136	int numprots;
1137
1138	if (cli->protocol < PROTOCOL_NT1)
1139	cli->use_spnego = False;
1140
1141	memset(cli->outbuf,'\0',smb_size);
1142
1143	/* setup the protocol strings */
1144	set_message(cli->outbuf,0,0,True);
1145
1146	p = smb_buf(cli->outbuf);
1147	for (numprots=0;
1148	prots[numprots].name && prots[numprots].prot<=cli->protocol;
1149	numprots++) {
1150	*p++ = 2;
1151	p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1152	}
1153
1154	SCVAL(cli->outbuf,smb_com,SMBnegprot);
1155	cli_setup_bcc(cli, p);
1156	cli_setup_packet(cli);
1157
1158	SCVAL(smb_buf(cli->outbuf),0,2);
1159
1160	cli_send_smb(cli);
1161	}
1162
1163	/****************************************************************************
1164	Send a negprot command.
1165	****************************************************************************/
1166
1167	BOOL cli_negprot(struct cli_state *cli)
1168	{
1169	char *p;
1170	int numprots;
1171	int plength;
1172
1173	if (cli->protocol < PROTOCOL_NT1)
1174	cli->use_spnego = False;
1175
1176	memset(cli->outbuf,'\0',smb_size);
1177
1178	/* setup the protocol strings */
1179	for (plength=0,numprots=0;
1180	prots[numprots].name && prots[numprots].prot<=cli->protocol;
1181	numprots++)
1182	plength += strlen(prots[numprots].name)+2;
1183
1184	set_message(cli->outbuf,0,plength,True);
1185
1186	p = smb_buf(cli->outbuf);
1187	for (numprots=0;
1188	prots[numprots].name && prots[numprots].prot<=cli->protocol;
1189	numprots++) {
1190	*p++ = 2;
1191	p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1192	}
1193
1194	SCVAL(cli->outbuf,smb_com,SMBnegprot);
1195	cli_setup_packet(cli);
1196
1197	SCVAL(smb_buf(cli->outbuf),0,2);
1198
1199	cli_send_smb(cli);
1200	if (!cli_receive_smb(cli))
1201	return False;
1202
1203	show_msg(cli->inbuf);
1204
1205	if (cli_is_error(cli) \|\|
1206	((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1207	return(False);
1208	}
1209
1210	cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1211
1212	if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1213	DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1214	return False;
1215	}
1216
1217	if (cli->protocol >= PROTOCOL_NT1) {
1218	struct timespec ts;
1219	/* NT protocol */
1220	cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1221	cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1222	cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1223	cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1224	cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1225	cli->serverzone *= 60;
1226	/* this time arrives in real GMT */
1227	ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1228	cli->servertime = ts.tv_sec;
1229	cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1230	cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1231	if (cli->capabilities & CAP_RAW_MODE) {
1232	cli->readbraw_supported = True;
1233	cli->writebraw_supported = True;
1234	}
1235	/* work out if they sent us a workgroup */
1236	if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1237	smb_buflen(cli->inbuf) > 8) {
1238	clistr_pull(cli, cli->server_domain,
1239	smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1240	smb_buflen(cli->inbuf)-8, STR_UNICODE\|STR_NOALIGN);
1241	}
1242
1243	/*
1244	* As signing is slow we only turn it on if either the client or
1245	* the server require it. JRA.
1246	*/
1247
1248	if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1249	/* Fail if server says signing is mandatory and we don't want to support it. */
1250	if (!cli->sign_info.allow_smb_signing) {
1251	DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1252	return False;
1253	}
1254	cli->sign_info.negotiated_smb_signing = True;
1255	cli->sign_info.mandatory_signing = True;
1256	} else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1257	/* Fail if client says signing is mandatory and the server doesn't support it. */
1258	if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1259	DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1260	return False;
1261	}
1262	cli->sign_info.negotiated_smb_signing = True;
1263	cli->sign_info.mandatory_signing = True;
1264	} else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1265	cli->sign_info.negotiated_smb_signing = True;
1266	}
1267
1268	if (cli->capabilities & (CAP_LARGE_READX\|CAP_LARGE_WRITEX)) {
1269	SAFE_FREE(cli->outbuf);
1270	SAFE_FREE(cli->inbuf);
1271	cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1272	cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1273	cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
1274	}
1275
1276	} else if (cli->protocol >= PROTOCOL_LANMAN1) {
1277	cli->use_spnego = False;
1278	cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1279	cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1280	cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1281	cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1282	cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1283	cli->serverzone *= 60;
1284	/* this time is converted to GMT by make_unix_date */
1285	cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1286	cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1287	cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1288	cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1289	} else {
1290	/* the old core protocol */
1291	cli->use_spnego = False;
1292	cli->sec_mode = 0;
1293	cli->serverzone = get_time_zone(time(NULL));
1294	}
1295
1296	cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1297
1298	/* a way to force ascii SMB */
1299	if (getenv("CLI_FORCE_ASCII"))
1300	cli->capabilities &= ~CAP_UNICODE;
1301
1302	return True;
1303	}
1304
1305	/****************************************************************************
1306	Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1307	****************************************************************************/
1308
1309	BOOL cli_session_request(struct cli_state *cli,
1310	struct nmb_name calling, struct nmb_name called)
1311	{
1312	char *p;
1313	int len = 4;
1314
1315	memcpy(&(cli->calling), calling, sizeof(*calling));
1316	memcpy(&(cli->called ), called , sizeof(*called ));
1317
1318	/* put in the destination name */
1319	p = cli->outbuf+len;
1320	name_mangle(cli->called .name, p, cli->called .name_type);
1321	len += name_len(p);
1322
1323	/* and my name */
1324	p = cli->outbuf+len;
1325	name_mangle(cli->calling.name, p, cli->calling.name_type);
1326	len += name_len(p);
1327
1328	/* 445 doesn't have session request */
1329	if (cli->port == 445)
1330	return True;
1331
1332	/* send a session request (RFC 1002) */
1333	/* setup the packet length
1334	* Remove four bytes from the length count, since the length
1335	* field in the NBT Session Service header counts the number
1336	* of bytes which follow. The cli_send_smb() function knows
1337	* about this and accounts for those four bytes.
1338	* CRH.
1339	*/
1340	len -= 4;
1341	_smb_setlen(cli->outbuf,len);
1342	SCVAL(cli->outbuf,0,0x81);
1343
1344	cli_send_smb(cli);
1345	DEBUG(5,("Sent session request\n"));
1346
1347	if (!cli_receive_smb(cli))
1348	return False;
1349
1350	if (CVAL(cli->inbuf,0) == 0x84) {
1351	/* C. Hoch 9/14/95 Start */
1352	/* For information, here is the response structure.
1353	* We do the byte-twiddling to for portability.
1354	struct RetargetResponse{
1355	unsigned char type;
1356	unsigned char flags;
1357	int16 length;
1358	int32 ip_addr;
1359	int16 port;
1360	};
1361	*/
1362	int port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1363	/* SESSION RETARGET */
1364	putip((char *)&cli->dest_ip,cli->inbuf+4);
1365
1366	cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip, port, LONG_CONNECT_TIMEOUT);
1367	if (cli->fd == -1)
1368	return False;
1369
1370	DEBUG(3,("Retargeted\n"));
1371
1372	set_socket_options(cli->fd,user_socket_options);
1373
1374	/* Try again */
1375	{
1376	static int depth;
1377	BOOL ret;
1378	if (depth > 4) {
1379	DEBUG(0,("Retarget recursion - failing\n"));
1380	return False;
1381	}
1382	depth++;
1383	ret = cli_session_request(cli, calling, called);
1384	depth--;
1385	return ret;
1386	}
1387	} /* C. Hoch 9/14/95 End */
1388
1389	if (CVAL(cli->inbuf,0) != 0x82) {
1390	/* This is the wrong place to put the error... JRA. */
1391	cli->rap_error = CVAL(cli->inbuf,4);
1392	return False;
1393	}
1394	return(True);
1395	}
1396
1397	/****************************************************************************
1398	Open the client sockets.
1399	****************************************************************************/
1400
1401	BOOL cli_connect(struct cli_state cli, const char host, struct in_addr *ip)
1402	{
1403	int name_type = 0x20;
1404	char *p;
1405
1406	/* reasonable default hostname */
1407	if (!host) host = "*SMBSERVER";
1408
1409	fstrcpy(cli->desthost, host);
1410
1411	/* allow hostnames of the form NAME#xx and do a netbios lookup */
1412	if ((p = strchr(cli->desthost, '#'))) {
1413	name_type = strtol(p+1, NULL, 16);
1414	*p = 0;
1415	}
1416
1417	if (!ip \|\| is_zero_ip(*ip)) {
1418	if (!resolve_name(cli->desthost, &cli->dest_ip, name_type)) {
1419	return False;
1420	}
1421	if (ip) *ip = cli->dest_ip;
1422	} else {
1423	cli->dest_ip = *ip;
1424	}
1425
1426	if (getenv("LIBSMB_PROG")) {
1427	cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1428	} else {
1429	/* try 445 first, then 139 */
1430	int port = cli->port?cli->port:445;
1431	cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1432	port, cli->timeout);
1433	if (cli->fd == -1 && cli->port == 0) {
1434	port = 139;
1435	cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1436	port, cli->timeout);
1437	}
1438	if (cli->fd != -1)
1439	cli->port = port;
1440	}
1441	if (cli->fd == -1) {
1442	DEBUG(1,("Error connecting to %s (%s)\n",
1443	ip?inet_ntoa(*ip):host,strerror(errno)));
1444	return False;
1445	}
1446
1447	set_socket_options(cli->fd,user_socket_options);
1448
1449	return True;
1450	}
1451
1452	/**
1453	establishes a connection to after the negprot.
1454	@param output_cli A fully initialised cli structure, non-null only on success
1455	@param dest_host The netbios name of the remote host
1456	@param dest_ip (optional) The the destination IP, NULL for name based lookup
1457	@param port (optional) The destination port (0 for default)
1458	@param retry BOOL. Did this connection fail with a retryable error ?
1459
1460	*/
1461	NTSTATUS cli_start_connection(struct cli_state **output_cli,
1462	const char *my_name,
1463	const char *dest_host,
1464	struct in_addr *dest_ip, int port,
1465	int signing_state, int flags,
1466	BOOL *retry)
1467	{
1468	NTSTATUS nt_status;
1469	struct nmb_name calling;
1470	struct nmb_name called;
1471	struct cli_state *cli;
1472	struct in_addr ip;
1473
1474	if (retry)
1475	*retry = False;
1476
1477	if (!my_name)
1478	my_name = global_myname();
1479
1480	if (!(cli = cli_initialise())) {
1481	return NT_STATUS_NO_MEMORY;
1482	}
1483
1484	make_nmb_name(&calling, my_name, 0x0);
1485	make_nmb_name(&called , dest_host, 0x20);
1486
1487	if (cli_set_port(cli, port) != port) {
1488	cli_shutdown(cli);
1489	return NT_STATUS_UNSUCCESSFUL;
1490	}
1491
1492	cli_set_timeout(cli, 10000); /* 10 seconds. */
1493
1494	if (dest_ip)
1495	ip = *dest_ip;
1496	else
1497	ZERO_STRUCT(ip);
1498
1499	again:
1500
1501	DEBUG(3,("Connecting to host=%s\n", dest_host));
1502
1503	if (!cli_connect(cli, dest_host, &ip)) {
1504	DEBUG(1,("cli_start_connection: failed to connect to %s (%s)\n",
1505	nmb_namestr(&called), inet_ntoa(ip)));
1506	cli_shutdown(cli);
1507	if (is_zero_ip(ip)) {
1508	return NT_STATUS_BAD_NETWORK_NAME;
1509	} else {
1510	return NT_STATUS_CONNECTION_REFUSED;
1511	}
1512	}
1513
1514	if (retry)
1515	*retry = True;
1516
1517	if (!cli_session_request(cli, &calling, &called)) {
1518	char *p;
1519	DEBUG(1,("session request to %s failed (%s)\n",
1520	called.name, cli_errstr(cli)));
1521	if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1522	*p = 0;
1523	goto again;
1524	}
1525	if (strcmp(called.name, "*SMBSERVER")) {
1526	make_nmb_name(&called , "*SMBSERVER", 0x20);
1527	goto again;
1528	}
1529	return NT_STATUS_BAD_NETWORK_NAME;
1530	}
1531
1532	cli_setup_signing_state(cli, signing_state);
1533
1534	if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1535	cli->use_spnego = False;
1536	else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1537	cli->use_kerberos = True;
1538
1539	if (!cli_negprot(cli)) {
1540	DEBUG(1,("failed negprot\n"));
1541	nt_status = cli_nt_error(cli);
1542	if (NT_STATUS_IS_OK(nt_status)) {
1543	nt_status = NT_STATUS_UNSUCCESSFUL;
1544	}
1545	cli_shutdown(cli);
1546	return nt_status;
1547	}
1548
1549	*output_cli = cli;
1550	return NT_STATUS_OK;
1551	}
1552
1553
1554	/**
1555	establishes a connection right up to doing tconX, password specified.
1556	@param output_cli A fully initialised cli structure, non-null only on success
1557	@param dest_host The netbios name of the remote host
1558	@param dest_ip (optional) The the destination IP, NULL for name based lookup
1559	@param port (optional) The destination port (0 for default)
1560	@param service (optional) The share to make the connection to. Should be 'unqualified' in any way.
1561	@param service_type The 'type' of serivice.
1562	@param user Username, unix string
1563	@param domain User's domain
1564	@param password User's password, unencrypted unix string.
1565	@param retry BOOL. Did this connection fail with a retryable error ?
1566	*/
1567
1568	NTSTATUS cli_full_connection(struct cli_state **output_cli,
1569	const char *my_name,
1570	const char *dest_host,
1571	struct in_addr *dest_ip, int port,
1572	const char service, const char service_type,
1573	const char user, const char domain,
1574	const char *password, int flags,
1575	int signing_state,
1576	BOOL *retry)
1577	{
1578	NTSTATUS nt_status;
1579	struct cli_state *cli = NULL;
1580	int pw_len = password ? strlen(password)+1 : 0;
1581
1582	*output_cli = NULL;
1583
1584	if (password == NULL) {
1585	password = "";
1586	}
1587
1588	nt_status = cli_start_connection(&cli, my_name, dest_host,
1589	dest_ip, port, signing_state, flags, retry);
1590
1591	if (!NT_STATUS_IS_OK(nt_status)) {
1592	return nt_status;
1593	}
1594
1595	nt_status = cli_session_setup(cli, user, password, pw_len, password,
1596	pw_len, domain);
1597	if (!NT_STATUS_IS_OK(nt_status)) {
1598
1599	if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1600	DEBUG(1,("failed session setup with %s\n",
1601	nt_errstr(nt_status)));
1602	cli_shutdown(cli);
1603	return nt_status;
1604	}
1605
1606	nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1607	if (!NT_STATUS_IS_OK(nt_status)) {
1608	DEBUG(1,("anonymous failed session setup with %s\n",
1609	nt_errstr(nt_status)));
1610	cli_shutdown(cli);
1611	return nt_status;
1612	}
1613	}
1614
1615	if (service) {
1616	if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1617	nt_status = cli_nt_error(cli);
1618	DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1619	cli_shutdown(cli);
1620	if (NT_STATUS_IS_OK(nt_status)) {
1621	nt_status = NT_STATUS_UNSUCCESSFUL;
1622	}
1623	return nt_status;
1624	}
1625	}
1626
1627	cli_init_creds(cli, user, domain, password);
1628
1629	*output_cli = cli;
1630	return NT_STATUS_OK;
1631	}
1632
1633	/****************************************************************************
1634	Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1635	****************************************************************************/
1636
1637	BOOL attempt_netbios_session_request(struct cli_state *ppcli, const char srchost, const char *desthost,
1638	struct in_addr *pdest_ip)
1639	{
1640	struct nmb_name calling, called;
1641
1642	make_nmb_name(&calling, srchost, 0x0);
1643
1644	/*
1645	* If the called name is an IP address
1646	* then use *SMBSERVER immediately.
1647	*/
1648
1649	if(is_ipaddress(desthost)) {
1650	make_nmb_name(&called, "*SMBSERVER", 0x20);
1651	} else {
1652	make_nmb_name(&called, desthost, 0x20);
1653	}
1654
1655	if (!cli_session_request(*ppcli, &calling, &called)) {
1656	struct nmb_name smbservername;
1657
1658	make_nmb_name(&smbservername , "*SMBSERVER", 0x20);
1659
1660	/*
1661	* If the name wasn't *SMBSERVER then
1662	* try with *SMBSERVER if the first name fails.
1663	*/
1664
1665	if (nmb_name_equal(&called, &smbservername)) {
1666
1667	/*
1668	* The name used was *SMBSERVER, don't bother with another name.
1669	*/
1670
1671	DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1672	with error %s.\n", desthost, cli_errstr(*ppcli) ));
1673	return False;
1674	}
1675
1676	/* Try again... */
1677	cli_shutdown(*ppcli);
1678
1679	*ppcli = cli_initialise();
1680	if (!*ppcli) {
1681	/* Out of memory... */
1682	return False;
1683	}
1684
1685	if (!cli_connect(*ppcli, desthost, pdest_ip) \|\|
1686	!cli_session_request(*ppcli, &calling, &smbservername)) {
1687	DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1688	name SMBSERVER with error %s\n", desthost, cli_errstr(ppcli) ));
1689	return False;
1690	}
1691	}
1692
1693	return True;
1694	}
1695
1696
1697
1698
1699
1700	/****************************************************************************
1701	Send an old style tcon.
1702	****************************************************************************/
1703	NTSTATUS cli_raw_tcon(struct cli_state *cli,
1704	const char service, const char pass, const char *dev,
1705	uint16 max_xmit, uint16 tid)
1706	{
1707	char *p;
1708
1709	if (!lp_client_plaintext_auth() && (*pass)) {
1710	DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1711	" is disabled\n"));
1712	return NT_STATUS_ACCESS_DENIED;
1713	}
1714
1715	memset(cli->outbuf,'\0',smb_size);
1716	memset(cli->inbuf,'\0',smb_size);
1717
1718	set_message(cli->outbuf, 0, 0, True);
1719	SCVAL(cli->outbuf,smb_com,SMBtcon);
1720	cli_setup_packet(cli);
1721
1722	p = smb_buf(cli->outbuf);
1723	*p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE \| STR_NOALIGN);
1724	*p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE \| STR_NOALIGN);
1725	*p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE \| STR_NOALIGN);
1726
1727	cli_setup_bcc(cli, p);
1728
1729	cli_send_smb(cli);
1730	if (!cli_receive_smb(cli)) {
1731	return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1732	}
1733
1734	if (cli_is_error(cli)) {
1735	return cli_nt_error(cli);
1736	}
1737
1738	*max_xmit = SVAL(cli->inbuf, smb_vwv0);
1739	*tid = SVAL(cli->inbuf, smb_vwv1);
1740
1741	return NT_STATUS_OK;
1742	}
1743
1744	/* Return a cli_state pointing at the IPC$ share for the given server */
1745
1746	struct cli_state get_ipc_connect(char server, struct in_addr *server_ip,
1747	struct user_auth_info *user_info)
1748	{
1749	struct cli_state *cli;
1750	pstring myname;
1751	NTSTATUS nt_status;
1752
1753	get_myname(myname);
1754
1755	nt_status = cli_full_connection(&cli, myname, server, server_ip, 0, "IPC$", "IPC",
1756	user_info->username, lp_workgroup(), user_info->password,
1757	CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK, Undefined, NULL);
1758
1759	if (NT_STATUS_IS_OK(nt_status)) {
1760	return cli;
1761	} else if (is_ipaddress(server)) {
1762	/* windows 9* needs a correct NMB name for connections */
1763	fstring remote_name;
1764
1765	if (name_status_find("", 0, 0, server_ip, remote_name)) {
1766	cli = get_ipc_connect(remote_name, server_ip, user_info);
1767	if (cli)
1768	return cli;
1769	}
1770	}
1771	return NULL;
1772	}
1773
1774	/*
1775	* Given the IP address of a master browser on the network, return its
1776	* workgroup and connect to it.
1777	*
1778	* This function is provided to allow additional processing beyond what
1779	* get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1780	* browsers and obtain each master browsers' list of domains (in case the
1781	* first master browser is recently on the network and has not yet
1782	* synchronized with other master browsers and therefore does not yet have the
1783	* entire network browse list)
1784	*/
1785
1786	struct cli_state get_ipc_connect_master_ip(struct ip_service mb_ip, pstring workgroup, struct user_auth_info *user_info)
1787	{
1788	static fstring name;
1789	struct cli_state *cli;
1790	struct in_addr server_ip;
1791
1792	DEBUG(99, ("Looking up name of master browser %s\n",
1793	inet_ntoa(mb_ip->ip)));
1794
1795	/*
1796	* Do a name status query to find out the name of the master browser.
1797	* We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1798	* master browser will not respond to a wildcard query (or, at least,
1799	* an NT4 server acting as the domain master browser will not).
1800	*
1801	* We might be able to use ONLY the query on MSBROWSE, but that's not
1802	* yet been tested with all Windows versions, so until it is, leave
1803	* the original wildcard query as the first choice and fall back to
1804	* MSBROWSE if the wildcard query fails.
1805	*/
1806	if (!name_status_find("*", 0, 0x1d, mb_ip->ip, name) &&
1807	!name_status_find(MSBROWSE, 1, 0x1d, mb_ip->ip, name)) {
1808
1809	DEBUG(99, ("Could not retrieve name status for %s\n",
1810	inet_ntoa(mb_ip->ip)));
1811	return NULL;
1812	}
1813
1814	if (!find_master_ip(name, &server_ip)) {
1815	DEBUG(99, ("Could not find master ip for %s\n", name));
1816	return NULL;
1817	}
1818
1819	pstrcpy(workgroup, name);
1820
1821	DEBUG(4, ("found master browser %s, %s\n",
1822	name, inet_ntoa(mb_ip->ip)));
1823
1824	cli = get_ipc_connect(inet_ntoa(server_ip), &server_ip, user_info);
1825
1826	return cli;
1827
1828	}
1829
1830	/*
1831	* Return the IP address and workgroup of a master browser on the network, and
1832	* connect to it.
1833	*/
1834
1835	struct cli_state get_ipc_connect_master_ip_bcast(pstring workgroup, struct user_auth_info user_info)
1836	{
1837	struct ip_service *ip_list;
1838	struct cli_state *cli;
1839	int i, count;
1840
1841	DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1842
1843	/* Go looking for workgroups by broadcasting on the local network */
1844
1845	if (!name_resolve_bcast(MSBROWSE, 1, &ip_list, &count)) {
1846	DEBUG(99, ("No master browsers responded\n"));
1847	return False;
1848	}
1849
1850	for (i = 0; i < count; i++) {
1851	DEBUG(99, ("Found master browser %s\n", inet_ntoa(ip_list[i].ip)));
1852
1853	cli = get_ipc_connect_master_ip(&ip_list[i], workgroup, user_info);
1854	if (cli)
1855	return(cli);
1856	}
1857
1858	return NULL;
1859	}

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source: trunk/samba-3.0.25pre1/source/libsmb/cliconnect.c@ 16

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